<template>
  <div class="component-upload-image">
    <el-upload
      ref="imageUploadRef"
      multiple
      :data="{ accountId: props.accountId, advertiserId: props.advertiserId }"
      :action="uploadImgUrl"
      list-type="picture-card"
      :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :before-remove="handleDelete"
      :show-file-list="true"
      :headers="headers"
      :file-list="fileList"
      :on-preview="handlePictureCardPreview"
      :class="{ hide: fileList.length >= limit }"
    >
      <div class="flex flex-col items-center">
        <div class="flex items-center txtbox leading-[18px]">
          <el-icon class="avatar-uploader-icon">
            <plus />
          </el-icon>
          <div class="txt">本地图片</div>
        </div>
        <div class="leading-[18px] numbox">({{ fileList.length }}/{{ limit }})</div>
      </div>
    </el-upload>
    <!-- 上传提示 -->
    <div v-if="showTip" class="el-upload__tip">
      请上传
      <template v-if="fileSize">
        大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
      </template>
      <template v-if="fileType">
        格式为 <b style="color: #f56c6c">{{ fileType.join('/') }}</b>
      </template>
      的文件
    </div>

    <el-dialog v-model="dialogVisible" title="预览" width="800px" append-to-body>
      <img :src="dialogImageUrl" style="display: block; max-width: 100%; margin: 0 auto" />
    </el-dialog>
  </div>
</template>

<script setup lang="ts">
import { listByIds, delOss } from '@/api/system/oss';
import { OssVO } from '@/api/system/oss/types';
import { propTypes } from '@/utils/propTypes';
import { globalHeaders } from '@/utils/request';
import { compressAccurately } from 'image-conversion';

const props = defineProps({
  modelValue: {
    type: [String, Object, Array],
    default: () => []
  },
  // 图片数量限制
  limit: propTypes.number.def(5),
  // 大小限制(MB)
  fileSize: propTypes.number.def(5),
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: propTypes.array.def(['png', 'jpg', 'jpeg']),
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  // 是否支持压缩，默认否
  compressSupport: {
    type: Boolean,
    default: false
  },
  // 压缩目标大小，单位KB。默认300KB以上文件才压缩，并压缩至300KB以内
  compressTargetSize: propTypes.number.def(300),
  accountId: {
    type: String,
    default: ''
  },
  advertiserId: {
    type: String,
    default: ''
  },
  imageWidthLimt: {
    type: Number,
    default: 0
  },
  imageHeightLimt: {
    type: Number,
    default: 0
  }
});

const { proxy } = getCurrentInstance() as ComponentInternalInstance;
const emit = defineEmits(['update:modelValue']);
const number = ref(0);
const uploadList = ref<any[]>([]);
const dialogImageUrl = ref('');
const dialogVisible = ref(false);

const baseUrl = import.meta.env.VITE_APP_BASE_API;
const uploadImgUrl = ref(baseUrl + 'oce/upload/image'); // 上传的图片服务器地址
const headers = ref(globalHeaders());
// headers.value['Content-Type'] = 'multipart/form-data';

const fileList = ref<any[]>([]);
const showTip = computed(() => props.isShowTip && (props.fileType || props.fileSize));

const imageUploadRef = ref<ElUploadInstance>();

watch(
  () => props.modelValue,
  async (val: string) => {
    if (val) {
      if (val.length) {
        fileList.value = val;
      } else {
        fileList.value = [];
      }
    } else {
      fileList.value = [];
      return [];
    }
  },
  { deep: true, immediate: true }
);

/** 上传前loading加载 */
const handleBeforeUpload = (file: any) => {
  let isImg = false;
  if (props.fileType.length) {
    let fileExtension = '';
    if (file.name.lastIndexOf('.') > -1) {
      fileExtension = file.name.slice(file.name.lastIndexOf('.') + 1);
    }
    isImg = props.fileType.some((type: any) => {
      if (file.type.indexOf(type) > -1) return true;
      if (fileExtension && fileExtension.indexOf(type) > -1) return true;
      return false;
    });
  } else {
    isImg = file.type.indexOf('image') > -1;
  }
  if (!isImg) {
    proxy?.$modal.msgError(`文件格式不正确, 请上传${props.fileType.join('/')}图片格式文件!`);
    return false;
  }
  if (file.name.includes(',')) {
    proxy?.$modal.msgError('文件名不正确，不能包含英文逗号!');
    return false;
  }
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy?.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }

  const img = new Image();
  img.src = URL.createObjectURL(file);

  return new Promise<boolean>((resolve) => {
    img.onload = () => {
      if (img.width > props.imageWidthLimt || img.height > props.imageHeightLimt) {
        proxy?.$modal.msgError(`图片尺寸不能超过 ${props.imageWidthLimt}x${props.imageHeightLimt}px!`);
        resolve(false);
      } else {
        // 压缩图片处理
        if (props.compressSupport && file.size / 1024 > props.compressTargetSize) {
          proxy?.$modal.loading('正在上传图片，请稍候...');
          number.value++;
          compressAccurately(file, props.compressTargetSize);
          resolve(true);
        } else {
          proxy?.$modal.loading('正在上传图片，请稍候...');
          number.value++;
          resolve(true);
        }
      }
    };
  });
};

// 文件个数超出
const handleExceed = () => {
  proxy?.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
};

// 上传成功回调
const handleUploadSuccess = (res: any, file: UploadFile) => {
  if (res.code === 200) {
    uploadList.value.push({
      id: res.data.id,
      uri: res.data.url,
      materialId: res.data.materialId,
      signature: res.data.signature,
      format: res.data.format,
      width: res.data.width,
      height: res.data.height,
      size: res.data.size,
      url: res.data.url
    });

    uploadedSuccessfully();
    proxy?.$modal.closeLoading();
  } else {
    number.value--;
    proxy?.$modal.closeLoading();
    proxy?.$modal.msgError(res.msg);
    imageUploadRef.value?.handleRemove(file);
    uploadedSuccessfully();
  }
};

// 删除图片
const handleDelete = (file: UploadFile): boolean => {
  const findex = fileList.value.map((f) => f.materialId).indexOf(file.materialId);
  if (findex > -1 && uploadList.value.length === number.value) {
    fileList.value.splice(findex, 1);
    emit('update:modelValue', fileList.value);
    return false;
  }
  return true;
};

// 上传结束处理
const uploadedSuccessfully = () => {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter((f) => f.id !== undefined).concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;
    emit('update:modelValue', fileList.value);
    // emit('update:modelValue', uploadList.value);

    proxy?.$modal.closeLoading();
  }
};

// 上传失败
const handleUploadError = () => {
  proxy?.$modal.msgError('上传图片失败');
  proxy?.$modal.closeLoading();
};

// 预览
const handlePictureCardPreview = (file: any) => {
  dialogImageUrl.value = file.url;
  dialogVisible.value = true;
};

// 对象转成指定字符串分隔
const listToString = (list: any[], separator?: string) => {
  return JSON.stringify(list);
};
</script>

<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
:deep(.el-upload--picture-card) {
  --el-upload-picture-card-size: 100px;
}
:deep(.el-upload-list--picture-card .el-upload-list__item) {
  width: 100px;
  height: 100px;
}

:deep(.hide .el-upload--picture-card) {
  display: none;
}
</style>
